Stimulants will make them more active during work hours. They are talking about energy in evening hours. If you are suggesting stimulant use in evening hours, let me shut that down right now, because it will affect their sleep quality.
Exercise is a decent idea. I would suggest an antidepressant instead of a stimulant, though.
Exercise is a decent idea. I would suggest an antidepressant instead of a stimulant, though.